Aminotransferases around 300 U/L require hospitalization. Because the normal aminotransferase is 0-40U/L, aminotransferase around 300U/L is already significantly higher than normal, indicating that the liver has been damaged. Transaminases are essential catalysts in the normal operation of the human liver and are the barometer of the liver. Liver cells are the main living place of transaminases, and when liver cells are damaged by inflammation, poisoning, necrosis, etc., transaminases are released into the blood, causing the serum transaminases to rise. Transaminase elevation is very sensitive and doubles when liver cells are damaged by 1%. When transaminases reach 300 U/L, hospitalization is required for liver preservation and symptomatic support treatment, as well as finding the cause and treating it.